SAP DB E-Catalog 
SAP DB E-Catalog is a database instance type of the SAP DB database system.
In Internet catalog applications, a small number of hits must be determined from a large number of product descriptions. The functions of a SAP DB OLTP database instance are enhanced for this purpose, if necessary.
One application example is the BugsEye or eMerge product from Requisite.
For this application, the TREX search engine has been integrated into the SAP DB OLTP relational database system. You can use theTREX search engine to index product descriptions (long texts) and search for search terms (exact search, phrase search, fuzzy search, linguistic search).